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1. What is the net charge on a Ca +3 ion?
2. What is the magnitude of the electric force between a proton and an electron in a hydrogen atom? Suppose they are point charges separated by 0.054 nm.
capacitors c115uf and c223uf are each charged to 10v then disconnected from the battery without changing the charge on
A small button placed on a horizontal rotating platform with diameter 0.326m will revolve with the platform when it is brought up to a rotational speed of 43.0rev/min, How far from the axis can the button be placed, without slipping,
A mass of 5 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 125 kPa. Initially, 2 kg of the water is in the liquid phase and the rest is in the vapor phase. Heat is now transferred to the water, and the pisto..
A cylinder of length L = 18 cm and radius R = 5.4 cm has its center at the origin and its axis along the x axis such that one end is at x= +9 cm , What is the net charge inside the cylinder
a circular conducting ring is split into two semi-circles. the top half has a positive charge q evenly distributed and
A satellite of mass 190 kilogram is launched from a site on Earth's equator into an orbit at 185 kilometer above the surface of Earth. Find the minimum energy necessary to place the satellite in orbit, assuming no air friction
a 190-kg block is launched by compressing a spring of constant k 200nm by 15 cm. the spring is mounted horizontally and
While warming up for a match, a tennis player stands at the baseline of the court, 11.9 m away from the net, how far below the top of the net does it hit
The rotor of an electric motor has rotational inertia Im = 5.12 x 10-3 kg·m2 about its central axis.Calculate the number of revolutions of the rotor required to turn the probe through 31.3° about its central axis
A laser emits 7.50 × 1017 photons per second in a beam of light that has a diameter of 1.89 mm and a wavelength of 514.5 nm. determine the average electric field strength
A rail car that weighs 44 N is accelerated at 6.4 m/s/s for 2.9 seconds. How much work is done on the rail car
A baseball pitcher can throw a ball with a speed of 40. He is in the back of a pickup truck that is driving away from you. He throws the ball in your direction, and it floats toward you at a lazy 30. What is the speed of truck.
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